Can the judge call to investigate the case before filing a case?

Legal analysis: Yes, the filing judge can contact the defendant according to the telephone number provided by the plaintiff to understand the case, so as to determine whether it meets the filing conditions. In addition, before the trial, if the criminal suspect has something that has not been made clear to the court before, or needs to add new facts, he can add new facts or omissions to the judge. After the people's court accepts the case, if the parties have objections to the jurisdiction, they shall raise them during the period of submitting the defense.

Legal basis: Article 125 of the Civil Procedure Law of People's Republic of China (PRC), the people's court shall send a copy of the complaint to the defendant within five days from the date of filing the case, and the defendant shall submit a reply within fifteen days from the date of receipt. The defense shall specify the defendant's name, gender, age, nationality, occupation, work unit, residence and contact information; The name and domicile of the legal person or other organization and the name, position and contact information of the legal representative or principal responsible person. The people's court shall send a copy of the defense to the plaintiff within five days from the date of receiving the defense. If the defendant fails to submit the defense, it will not affect the trial of the people's court.