高中生物实验设计过程中要遵循科学性原则、可行性原则、随机性原则、对照性原则、单因子变量原则、可重复性原则和平行重复原则等、其中的平行重复原则在教学中涉及相对较少,不少教师对它的理解模棱两可,甚至将其与可重复性原则混为一谈,本文笔者通过举例对比和解释这两个概念并阐述笔者个人的观点。 High school biology experiment design process to follow the scientific principle, feasibility principle, randomness principle, control principle, single-factor variable principle, repeatability principle and the principle of parallel repetition, etc., of which the principle of parallel repeat involved in the teaching of relatively Few teachers are ambiguous about it and even confuse it with the principle of repeatability. The writer compares and explains these two concepts by example and expounds the author’s personal opinions.