The invention discloses a method for evaluating the etching forms of the surface of a rock plate in an acid etching physical simulation test. The method sequentially comprises the following steps of: A, using a three-dimensional laser scanner to scan the rough surface of the rock plate subjected to acid etching to obtain three-dimensional data on the surface of the rock plate; B, calculating the transverse twisting ratio and the longitudinal twisting ratio of the surface of the rock plate; C, using the two parameters (the transverse twisting ratio and the longitudinal twisting ratio) to classify the etching forms of the surface of the rock plate; D, describing and evaluating various etching forms of the surface of the rock plate on the basis of the classification results; and E, sequentially sequencing various etching forms from the poorest one to the best one. The method has the advantages that a rock sample of an oil and gas reservoir is used for performing the acid etching physical simulation test; and rock samples with different etching forms are obtained through changing different test parameters (acid liquid viscosity, acid liquid concentration and acid injection discharge capacity). The principle is reliable; the operation is simple and convenient; and the guidance can be provided for acid fracturing construction parameter optimization.