由于琵琶的发音方式是点状的，与其他线条发音方式的声部有些许不融合；再有琵琶由于音量偏弱，在合奏中容易出现为了提高音量而产生噪音的现象；还有在一些文类乐曲中，如果不细致处理琵琶声部的音色，会使琵琶声部的音色僵硬，缺乏弹性，从而使整个乐曲的韵味大打折扣。基于此，本论文先从简单介绍民族管弦乐队的编制，重点阐述弹拨组的特点和琵琶单一声部的特点入手，配以说明琵琶重要的左右手技巧当中有关如何处理变化音色的方法，再结合琵琶声部在合奏过程中容易出现的问题，以《红楼梦》组曲当中的有代表性的段落为例，分析如何通过细致处理琵琶声部的音色，来尽量克服以上所提到的问题，提高整个乐队的音响效果，也给其他声部从润饰自身音色方面帮助提高整个乐队音响效果以一点启发。

As is the way pipa pronunciation points,lines and other forms of pronunciation is somewhat unharmonious.What’s more,because of the low volume of pipa,in the concert,it is easy to happen that noise arises in order to increase the volume.In the some music category, if not carefully handle and inflexible,so that the entire music flavor greatly reduces. Based on this, this paper first introduces the establishment of national orchestra, focusing on the characteristics of lute voice part and the pipa’s single sound department, supported by the method how the change of tamber is managed by the pipa’s important skill“left and right hand”,combined with the problem that pipa-Voice is easy to happen in the concert. A typical part of “ A Dream of Red Mansions” will be used as an example, analysising of how to deal with the Department of Pipa’s sound, in order to try to overcome the above mentioned problems,improve the band’s sound, but also that people will be inspired on how to polish the other sound department so as to improve the acoustics in the band.