The invention relates to a multiparty call display controlling method, a device and a mobile terminal. The method includes the following steps: (A) establishing conversation connection with calling parties; (B) displaying a conversation interface on a full present screen, then carrying out a step C; (C) judging whether the device has a call request from a third party or not, if yes, carrying out a step D, or, carrying out the step B; (D) diving the present screen into two parts to respectively display an communication interface with conversation established and an interface of the call request of the third party, then carrying out a step E; (E) judging whether operation which requires to hang up or refuse communication with one party is received or not, if yes, returning to the step B, and if no, returning to the step D. Through split-screen display, a three-party communication interface is enabled to be attractive and fast, operation by users is convenient, misoperation is not easy to produce, three-party communication can be easily achieved, even three-party video communication can be achieved, and user experience is improved.