Nowadays English level varies a lot from student to student, which is a great challenge for English teaching, while differentiating instruction is an effective way to solve the problems appeared in multilevel classes, and it will do a great help to the fulfillment of task-based language teaching.

Classroom equality means mainly that teachers deal equally with students in the course of classroom teaching,not partial to any individual student,but classroom equality does not mean fair to all even out.

In order to solve such problems,multimedia classroom teaching can adopt the mode of"multimedia exhibition and class writing on blackboard","demonstration,examples,anal.

A system of the assistant teaching and management for multimedia classroom was presented in this paper.

The present article explores the impact of multimedia technology on the transmission of information and discourse analysis in the classroom environment, and by comparing the contextual characteristics between traditional classroom and multimedia classroom,we tentatively propose some capacities the students should be cultivated in the new multimedia classroom environment.