The invention relates to a method for collecting data by an embedded Linux rotary encoder, which is the feasible method for collecting data by the encoder according to the software/hardware design, driving program development and actual application situations of a system. The misoperation caused by the shaking of the rotary encoder is reduced through program filtering. The method specifically comprises the following steps that: 1) an embedded Linux compiling platform is established; 2) a hardware circuit of the encoder: the encoder adopts a common incremental rotary encoder; 3) initialization and collection contrast processing are carried out on signals; 4) signal transmission: the data after collection contrast can be driven and transmitted to an application layer by the Linux encoder; and 5) all signal collection processing processes are ended to wait for the next action.