Crown said in October 18 staff had been held after a police operation believed to target its marketing activities.
Among them were three Australians, including Jason O'Connor, a senior executive in charge of attracting Chinese high-rollers.
Casino gambling, and promoting gambling abroad, are illegal in mainland China.
The cases have been referred to Shanghai's Baoshan District Court, the company said in a brief statement made to the Australian Stock Exchange.
The Australian newspaper reported that the court has set a hearing date for 26 June.
Crown Resorts, controlled by Australian billionaire James Packer, said that with the matter now before the court it would not be making further comment.

Russell Sherwood, 69, of Cilfrew, Neath, went missing while heading to Ewenny, Vale of Glamorgan, after Storm Angus hit in November.
Three days later, his body was found in the River Ogmore.
The Independent Police Complaints Commission (IPCC) is reviewing issues, including the force's call-handling.
Mr Sherwood was reported missing on 20 November after failing to collect his wife from work.
He was found dead on 23 November inside his Ford Focus, which had become submerged in the river.
The IPCC said it would investigate the police response to an earlier report of flooding across New Inn Road in Ewenny on the day of Mr Sherwood's disappearance.
It will also consider "whether call-handlers properly risk-assessed the information provided to them", but not Mr Sherwood's death specifically.
IPCC Commissioner for Wales Jan Williams said: "My thoughts are with the family of Mr Sherwood and all those affected by his tragic death.
"Our investigation will examine police actions prior to his disappearance and whether appropriate policies and procedures were followed.
"We have made contact with Mr Sherwood's family to explain our role and we will be keeping them updated as the investigation progresses."

The 23-year-old hit three consecutive birdies as he secured a two-shot lead over Japan's Hideki Matsuyama.
Americans William McGirt, Jimmy Walker and Ryan Moore are tied in third place with 14 under in Hawaii.
World number one Jason Day is in 13th place after a three-under 70, while Scotland's Russell Knox is seven shots off the lead with one round remaining.
"I left a lot our there. That is always a good thing because I can just go work on it and improve," Thomas said.

The 25-year-old will join the Women's Super League One club following this summer's European Championships, for which Belgium have qualified.
The former FC Twente forward has scored four goals in 26 international games.
"Yana was brought to my attention after recently playing against Scotland," head coach Willie Kirk told the club website. "Her style of play suits us and she is a big personality."
Casino operator Crown Resorts says its employees who were detained in China last year have been formally charged with illegally promoting gambling.
[NEXT_CONCEPT]
An investigation has been launched into South Wales Police's response to reported flooding before the death of a missing man.
[NEXT_CONCEPT]
American Justin Thomas shot his third-straight 67 to take the lead on day three of the Tournament of Champions.
[NEXT_CONCEPT]
Bristol City Women have signed Belgium striker Yana Daniels from Anderlecht.